Meaning of “of course” in the English Dictionary

british dictionary

"of course" in British English

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of course

A1 informal used to say yes or to give someone permission to do something:

"Can you help me?" "Of course."
"May I look at your newspaper?" "Of course you can."
"Have you written your English essay yet?" "Of course, I finished it last week."

B1 used to show that what you are saying is obvious or already known:

The Second World War ended, of course, in 1945.

used to show that a situation or a piece of information is not surprising:

We arrived at the restaurant 30 minutes late so, of course, our reservation had been cancelled.

(Definition of “of course” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"of course" in American English

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of course

yes, certainly:

"May I use your telephone?" "Of course, go right ahead."

(Definition of “of course” from the Cambridge Academic Content Dictionary © Cambridge University Press)